"This report provides the results of monitoring five salmonid species as downstream migrants in 2001 from the two most heavily spawned tributaries in the Lake Washington Basin: the Cedar River and Bear Creek. Monitoring sockeye fry production in the Cedar River began in 1992 to investigate the causes of low adult sockeye returns. This annual trapping program, which continued through 2001, was expanded in 1999 with the addition of a second downstream migrant trap to estimate the production of juvenile chinook salmon. With this trap we also estimate the production of other smolt populations: coho, steelhead and cutthroat. Assessment of sockeye fry production began in the Sammamish system in 1997. We placed the trap in the Sammamish River at Bothell where we also operated it during the 1998 season. In 1999, to assess chinook production as well as sockeye, we moved this monitoring program to Bear Creek. Since 1999, as in the Cedar River, this trapping operation has also estimated the populations of coho, steelhead and cutthroat smolts. The 2001 trapping season was notable for two unusual events. The interval from Fall 2000 through March of 2001 has become known as the winter without rain. Flows throughout this period were anomalously low as a result. The second anomaly, an earthquake measuring 6.8 on the Richter scale occurred on the morning of February 28. This quake, which was centered in the lower Nisqually Basin, was strong enough to trigger a landslide that temporarily blocked the Cedar River at River Mile 8."--Exec. Sum.